[c-nsp] disabling 3750 mac address learning

[sthaug at nethelp.no]

> I think there are a few differences between these.  The command docs say
> the following about RSPAN VLANs:
> - All traffic in the RSPAN VLAN is always flooded.
> - No MAC address learning occurs on the RSPAN VLAN.
> - RSPAN VLAN traffic only flows on trunk ports.
> - RSPAN VLANs must be configured in VLAN configuration mode by using the
> remote-span VLAN configuration mode command.
> - STP can run on RSPAN VLAN trunks but not on SPAN destination ports.
> - An RSPAN VLAN cannot be a private-VLAN primary or secondary VLAN.

Absolutely - the commands are not equivalent. What I was trying to say
was that the technical ability to disable MAC address learning has
existed for a while. I am glad that it can now done explicitly instead
of being "hidden away" in the form of RSPAN.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no